Formwork for prismatic columns, has tubular core with prismatic housing and cylindrical outer surface, covered by outer sheath at its periphery

摘要

The formwork has a tubular core (1) consisting of a cylindrical outer surface and an inner prismatic housing (2). The periphery of the core is covered by an outer sheath (4) formed with a slit (8), to facilitate fixing of the sheath to the core. The core is folded by an impermeable inner tubular lining (6), during transportation and storage.